Breast cancer is the most frequently diagnosed cancer and the second leading cause of cancer-related deaths among women. Breast ultrasound is an effective tool for distinguishing between cystic and solid masses and for identifying suspicious features of solid masses that may warrant a biopsy. Nevertheless, many breast lesions may initially appear similar to fibroadenomas on ultrasound and can mimic benign morphological characteristics of fibroadenomas on ultrasound, making the differentiation between benign fibroadenomas and malignant tumors of the breast mimicking fibroadenomas (MTMF) challenging. The objective of this retrospective study is to evaluate the reliability of ultrasound in distinguishing between fibroadenomas and malignant breast tumors that mimic fibroadenomas (MTMF), as well as to identify imaging features suggestive of malignancy.